- abut
- album
- alum
- alumna
- ambulant
- annual
- annul
- aunt
- autumn
- autumnal
- blunt
- bubba
- bulb
- bull
- bunt
- butt
- luau
- lull
- lulu
- luna
- lunula
- manual
- maul
- mull
- mutant
- mutt
- mutual
- muumuu
- null
- numb
- numbat
- tantalum
- taunt
- taut
- tuba
- tubal
- tumult
- tuna
- tutu
- ulna
- umlaut
- unban
- unman